Degassing module and method for degassing liquid

Abstract

A degassing module includes: a pipe including an in-pipe flow path having a liquid supply port and a liquid discharge port, the pipe having a plurality of holes that allow the in-pipe flow path to be open; a hollow fiber membrane group formed by winding hollow fiber membrane fabric around an outer circumferential side of the pipe, the hollow fiber membrane fabric having a plurality of hollow fiber membranes serving as wefts, and warps; a housing connected to an outer circumferential surface of the pipe and configured to store the hollow fiber membrane group; a partition unit configured to partition a region in the housing into an internal region including an inner circumferential side space of each of the plurality of hollow fiber membranes, and an external region including an inter-membrane space between the plurality of hollow fiber membranes; an air intake port of the housing.

1 . A degassing module comprising:
 a pipe including an in-pipe flow path having a liquid supply port and a liquid discharge port, the pipe having a plurality of holes that allow the in-pipe flow path to be open;   a hollow fiber membrane group formed by winding hollow fiber membrane fabric around an outer circumferential side of the pipe so as to cover the plurality of holes, the hollow fiber membrane fabric having a plurality of hollow fiber membranes serving as wefts, and warps;   a housing connected to an outer circumferential surface of the pipe and configured to store the hollow fiber membrane group;   a partition unit configured to partition a region in the housing into an internal region including an inner circumferential side space of each of the plurality of hollow fiber membranes, and an external region including an inter-membrane space between the plurality of hollow fiber membranes;   an air intake port of the housing, the air intake port communicating with the internal region; and   a baffle configured to partition the in-pipe flow path and the inter-membrane space in an extending direction of the pipe,   wherein a ratio of a diameter of each of the warps to a diameter of each of the plurality of hollow fiber membranes is 0.6 or higher.   
     
     
         2 . The degassing module according to  claim 1 ,
 wherein the ratio of the diameter of each of the warps to the diameter of each of the plurality of hollow fiber membranes is 1.5 or lower.   
     
     
         3 . The degassing module according to  claim 1 ,
 wherein the diameter of each of the warps is 50 μm or greater.   
     
     
         4 . The degassing module according to  claim 1 ,
 wherein the diameter of each of the warps is 300 μm or less.   
     
     
         5 . The degassing module according to  claim 1 ,
 wherein the diameter of each of the plurality of hollow fiber membranes is 50 μm or greater and 500 μm or less.   
     
     
         6 . The degassing module according to  claim 1 ,
 wherein a ratio of a pitch of the warps to the diameter of each of the plurality of hollow fiber membranes is 600 or lower.   
     
     
         7 . The degassing module according to  claim 6 ,
 wherein the ratio of the pitch of the warps to the diameter of each of the plurality of hollow fiber membranes is 2 or higher.   
     
     
         8 . The degassing module according to  claim 1 ,
 wherein the pitch of the warps is 30 mm or less.   
     
     
         9 . The degassing module according to  claim 1 ,
 wherein the pitch of the warps is 1 mm or greater.   
     
     
         10 . The degassing module according to  claim 1 ,
 wherein, when a storage region is a region between the housing and the pipe in a perpendicular section perpendicular to the extending direction, and a space region is a region which excludes the plurality of hollow fiber membranes and is between the housing and the pipe in the perpendicular section, a voidage that is a ratio of an area of the space region to an area of the storage region is 30% or higher and 80% or lower.   
     
     
         11 . The degassing module according to  claim 1 ,
 wherein the baffle includes:   an inner baffle disposed on an inner circumferential side of the pipe and configured to partition the in-pipe flow path in the extending direction; and   an outer baffle disposed on the outer circumferential side of the pipe and configured to partition the inter-membrane space in the extending direction.   
     
     
         12 . The degassing module according to  claim 1 ,
 wherein the partition unit includes:   a first sealing unit disposed at a first end on one side of the hollow fiber membrane group in the extending direction; and   a second sealing unit disposed at a second end on an other side of the hollow fiber membrane group in the extending direction,   an entire region which excludes the plurality of hollow fiber membranes and is between the pipe and the housing in a perpendicular section perpendicular to the extending direction is filled with each of the first sealing unit and the second sealing unit, and   the plurality of holes of the pipe are formed between the first sealing unit and the second sealing unit in the extending direction.   
     
     
         13 . The degassing module according to  claim 12 ,
 wherein the air intake port includes:   a first air intake port formed on an opposite side of the second sealing unit with respect to the first sealing unit in the extending direction; and   a second air intake port formed on an opposite side of the first sealing unit with respect to the second sealing unit in the extending direction.   
     
     
         14 . A method of degassing liquid, comprising:
 in the degassing module according to  claim 1 , sucking air from the internal region through the air intake port, and supplying liquid from the liquid supply port to the in-pipe flow path.   
     
     
         15 . The degassing module according to  claim 2 ,
 wherein the diameter of each of the warps is 50 μm or greater.   
     
     
         16 . The degassing module according to  claim 2 ,
 wherein the diameter of each of the warps is 300 μm or less.   
     
     
         17 . The degassing module according to  claim 2 ,
 wherein the diameter of each of the plurality of hollow fiber membranes is 50 μm or greater and 500 μm or less.   
     
     
         18 . The degassing module according to  claim 2 ,
 wherein a ratio of a pitch of the warps to the diameter of each of the plurality of hollow fiber membranes is 600 or lower.   
     
     
         19 . The degassing module according to  claim 2 ,
 wherein the pitch of the warps is 30 mm or less.   
     
     
         20 . The degassing module according to  claim 2 ,
 wherein the pitch of the warps is 1 mm or greater.